1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anni [7]
3 years ago
13

A substance has a heat of fusion of 155 J/g. How many joules of energy are required to be removed in order to freeze a 10.0 g sa

mple?
Chemistry
1 answer:
vovangra [49]3 years ago
5 0

1550J

Explanation:

Given parameters:

Heat of fusion = 155J/g

Mass of sample = 10g

Unknown:

Quantity of heat removed to freeze the substance =?

Solution:

This is a phase change problem and we apply the formula for the specific heat of fusion to solve the problem:

                 Q = mL

   m is the mass of the substance

   L is the specific heat of fusion of the substance.

We then plug the parameters into the equation:

                Q = 155J/g  x 10g = 1550J

Learn more:

specific heat brainly.com/question/7210400

#learnwithBrainly

You might be interested in
A 48.3 mL sample of gas in a cylinder is warmed from 22 C, 87 C to 0.0 C what is the final temperature
snow_lady [41]

The answer is:

the volume stays the same. it is the pressure that increases

7 0
3 years ago
Carboplatin (C6H12N2O4Pt) is a platinum-containing compound that is used to treat certain forms of cancer. This compound contain
givi [52]

Answer:

The answer to your question is:  $ 35.6

Explanation:

C₆H₁₂N₂O₄Pt

Platinum = 52.5 %

Price = $1047 / troy ounce

cost of platinum = ? of 2 g

1 troy ounce = 480 grains

1 grain = 64.8 mg

Process

Get 52.5 % of 2 g

                               2 g -----------------  100 %

                               x     -----------------  52.5%

                              x = (52.5 x 2) / 100

                              x = 1.05 g

                               1 g --------------------- 1000 mg

                               1.05 g ----------------   x

                               x = 1050 mg of Pt

                               1 grain ---------------- 64.8 mg

                              x            ---------------  1050 mg

                              x = 16.2 grains

                              480 grains ---------------- 1 troy ounce

                              16.2 grains ----------------   x

                               x = (16.2 x 1) / 480

                                x = 0.034 troy ounce

                              $ 1047 ------------------  1 troy ounce

                                x        -------------------  0.034

                                x = (0,034 x 1047) / 1

                                x = $ 35.6

3 0
3 years ago
What are the rules for writing chemical formulas
Alenkasestr [34]
1: the symbol of the metal should be written first.
2: the valency of the elements or radicals should be interchanged.
6 0
3 years ago
Give two examples in your everyday experience where diffusion occurs. Can you think of a situation of where this might be harmfu
Vesnalui [34]
The first example of diffusion is smoking a cigarette when u light it it spreads through the air. 
The second example is lighting a candle in a room it the smoke spreads through the air. 
Smoke can be very bad for the air and the people around because it can cause many problems with your breathing. 
8 0
3 years ago
In a particular titration experiment a 30.0 ml sample of an unknown hcl solution required 25.0 ml of 0.200 m naoh for the end po
Nikitich [7]
The balanced equation for the acid base reaction is as follows
NaOH + HCl ---> NaCl + H₂O
stoichiometry of NaOH to HCl is 1:1
the number of NaOH moles reacted - 0.200 mol/L x 0.0250 L = 0.005 mol
according to molar ratio
number of NaOH moles reacted = number of HCl moles reacted 
therefore number of HCl moles - 0.005 mol 
volume of 30.0  mL contains 0.005 mol
therefore 1000 mL contains - 0.005 mol / 0.030 L = 0.167 M
concentration of HCl is 0.167 M
5 0
3 years ago
Other questions:
  • Determine the molecular
    10·1 answer
  • PLEASE HELP!!!! Which is a correct statement of Newton's second law? Question 1 options: Every action has an equal and opposite
    6·2 answers
  • What do helium (He), neon (Ne), and argon (Ar) have in common?
    11·2 answers
  • PJ’s unknown solid 1) dissolves in hot ethanol, 2) is essentially insoluble in hexane, and 3) is insoluble in cold water, but sp
    14·1 answer
  • Theobromine, C7H8N4O2, is a component of chocolate. It is mildly diuretic, is a mild stimulant, and relaxes the smooth muscles o
    15·1 answer
  • Metallic behavior is generally associated with elements with partially filled p orbitals. elements with unpaired electrons. elem
    5·1 answer
  • What are the characteristics of solution,colloids,and susensions?
    10·2 answers
  • What name is given to group II elements in the periodic table
    6·2 answers
  • Please help!! ASAP, thanks
    5·1 answer
  • 8). How many moles of oxygen gas must be placed in a 35.0 L container in order
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!